Mounting for drive of pattern mechanism



Oct.- 26

W. H. WAKEFIELD MOUNTING FOR DRIVE 0F PATTERN'MECHANISM Filed April 5. 1926 Patented Oct. 26, 1926.

STATES FATE? FFIQE.

WALTER I-I. IV'AKEFIELD, OF VIORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMP'ION 6:. KNOWLES LOOM 'VVORKS, OF VJORCESTER, MASSACHUSETTS, A CORPORATION OF IJIL'ASSACHUSETTS.

MOUNTING FOR DRIVE OF PATTERN MECHANISM.

Application filed April 5, 1928.

This invention relates to improvements in head motions for looms of the type set forth in patent to Knowles No. 134,992 and it is the general object of the invention to provide an improved mounting for the uprigl'it shaft of such a loom so arranged. as to permit ready and convenient adjustment in timing between the head and the shaft of the loom which drives the upright shaft.

In looms of the type specified it is occasionally desirable to change the relative time of the head motion and the shaft of the loom which drives the head so that the harnesses maybe made to cross earlier or later or the boxes made to start their vertical movement earlier or later, as required. As constructed heretofore this change of timing has been accomplished by removing the gears on the connecting shafts and slipping one gear with' respect to the other, an operation which is inconvenient and timeconsuming. An attempt to improve upon the old method was made in the loom set forth in co-pending application Ser. No. 757,236 but in that application the upper part of the shaft was moved away from the pattern mechanism so that the connection between the driving gears on the upright shaft and the driven gears on the head cylinders was broken and after the shaft was given its new angular position it was necessary to turn the cylinder gears an amount corresponding to the motion of the upright shaft, otherwise the head and the loom shaft would remain in the same time relation.

It is a further object of my present invention to improve upon the construction set forth in said co-pending application by permitting the upright shaft to move about a center intermediate the cylinders of the head motion so that the gears on said shaft and the cylinders will always be in mesh while the bottom portion of the shaft is moved relatively to the loom driving shaft to effect angular adjustment.

lVith these and other objects in view which will appear as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings wherein I Serial No. 99,769.

have shown a convenient embodiment of my invention n Fig. 1 is a side elevation of a portion of a loom taken from the left hand end, the front of the loom being to the right of the figure,

Fig. 2 is a vertical section on line 22of 1 with the parts in normal driving position,

Fig. 3 is a view similar to Fig. 2 but with the upright shaft moved from the position shown in Fig. 2 to permit angular adjustment of said shaft and head with respect to the loom driving shaft,

Fig. 4 is a detail horizontal section on line ike of Fig. 1,

Fig. 5 is a rear elevation of the support for the lower end of the upright shaft looking in the direction of arrow 5, Fig. 1, and

Fig. 6 is a detail vertical section on line 66 of Fig. 3 showing the selvage motion cam and connector.

Referring to the drawings it will be seen that Ihave provided a loom side 10 having arches, one of which is indicated at 11, and a head frame 1.2. Said frame has journaled therein upper and lower oppositely and con stantly rotating mutilated cylinders 13 and 14, respectively, said cylinders cooperating with well-known mechanism not shown herein but connected to the harnesses and box motion to control the warp threads and boxes of the loom. The upper cylinder is driven by means of a bevel gear 15 rigid therewith and the lower cylinder 14 is driven by a similar bevel gear 16 rigid therewith.

In order to impart motion to the cylinders I provide an upright shaft 17 having upper and lower bevel gears 18 and 19, respectively, secured thereto in spaced relation and meshing respectively with gears 15 and 16. As the shaft rotates the cylinders 13 and 14 are rotated in opposite directions. The shaft 17 may be rotated by connections either to the top crank shaft or to the bottom shaft but I have shown herein for the purpose of illustration a connection with the upper or crank shaft 20. Said shaft has keyed thereto an eccentric gear 21 meshing with a second eccentric gear 22 journaled loosely on the stud 23 secured in a bearing or stand 2% by means of screw 25. Said eccentric gear 22 has preferably cast integral therewith a bevel gear 26 which together with the gear 22 is freely rotatable on stud 23.

The bevel gear 26 meshes with a corre sponding bevel 27 loose on shaft 17 and arranged to receive a pin 28 passing through a coll; secured to the bottom of shaft 17 and controlled as to vertical position by a clutch 3O controlled by a finger 31. Said finger is secured to a stub shaft 32 to which is removably secured a manually controlled arm 33 the clutch 3O normally being down in the driving position indicated in the drawings so that rotation of gear 27 causes rotation of shaft 17.

here are usually other forms of mechanism deriving their power from the upright shaft 17 and lwill illustrate but one of these, namely, a .selvage motion which comprises a driving bevel pinion 34: secured as at 35 to the bottom of shaft 17 and meshing with a bevel gear 36 of twice the pitch diameter of the pinion 34.. Said bevel gear 36 drives a cam 37 which cooperates with a link 38 to cause the same to have longitudinal reciprocating movement and operate a selvage motion (not shown), said gear 36 and cam 37 being freely rotatable on fixed stud 39. As shown in Fig. 6 the link 38 has a slot 40 through which extends stud well-known construction and forms no part of my present invention.

In carrying out my improvements I effect a change in the construction of the devices heretofore employed for supporting the bot tom of shaft 17 and the stud 39, and also alter the form of bearing heretofore used for the top of the upright shaft. t is customary to cast the stud 23 integrally with a depending arm and a support for the stud 39. Accordingly, the upper portion of arm is provided with a two-part bearing forn'ied with a cap 51 seated on shoulders of the arm 50 and held thereto by bolts which pass into the arm 50 as shown in Figs. 1 and 5. A. hearing or bore 5st is provided in the split part of the arm 50 to receive the lower portion of shaft 17 and the intermediate portions of the arm 50 has an opening which receives the bevel pinion The latter is secured to a reduced part 56 of shaft 17 the lower end of which extends into a second split bearing defined in part by the bottom of arm 50 and in part by cap 57 held in position by bolts 58 as shown in Figs. 1 and 5. The bore for the shaft extends into but not through the bottom of arm 50 and does not extend below the bottom of the cap 57 and for this reason removal of the latter will permit lateral motion of the shaft away from the arm 50.

The upper part of the .shaft 17 passes through a swivel bearing 60 which has extending forwardly therefrom a stud 61 passing through a bearing arm 62 secured to the head frame by bolts 63. ing (30 may be loosely journaled in arm 62 or it may be held in place by a nut 64 threaded on the reduced end of stud 61 and engaging the forward upper part of the bearing arm (32. Upward displacement of the shaft 17 is prevented by means of a collar 65 secured to the shaft 17 and engaging the lower portion of the swivel bearing 60.

Under normal. conditions the parts will be as shown in Figs. 1 and 2 and continued rotation of the shaft 20 will by means of gears 21 and 22 cause bevel gear 26 to drive the corresponding gear 27. The latter through pin 23 and collar 29 will cause r0- tation of shaft 17 which in turn will actuate the cylinders 13 and 14 as will be understood, the cylinders making one complete revolution for each revolution of the shaft 20. It will be understood that the various parts of the loom such as the picking, takeup, etc., will be in timed relation with the shaft 20 and will therefore be in fixed timed relation also with the cylinders 13 and 14. When it is desired to effect a change in this timing of the different parts of the cylinders with respect to the other instrumentalities timed with the shaft 20, the caps 51 and 57 will be removed as indicated in Fig. 3 and nut 6% will be loosened (if it is normally tight against bearing arm 62) so that the shaft 17 can move to the angular position shown in Fig. 3. To accomplish this resultit may be necessary to loosen the arm 33 with respect to the stub shaft 32. The shaft 17 can then be given either a right hand or a left hand angular movement corresponding to one or more teeth of the gear 27, according to the requirements of the particular case, after which the parts will be restored to the position shown in Fig. 2. During this adjustment the top shaft is held in fixed position either by means of a brake on the loom or in any other convenient manner and as shaft 17 is given its angular adjustn'ient the cylinders are kept in time therewith so that to restore the loom to running position it is necessary merely to replace the caps and tighten the screw 64, further attention to the head being unnecessary.

The selvage motion illustrated is of the type shown in patent to Knowles No. 186,350. Obviously, when the upright shaft is in the position shown in Fig. 3 the gear 36 can be turned, if desired, to

The swivel bear- IOU change the selvage motion to agree with the ad usted position of the head.

From the foregoing it will be seen that 1 have provided a simple means for adjusting the cylinders of a head motion with respect to the driving loom shaft by effecting disengagement between the upright shaft and the loom shaft to permit relative angular movement thereof without disengaging the driving connections between the upright shaft and the cylinders of the head motion. Also, the selvage motion, which operates the side threads of thewarp, can be adjusted easily to agree with the adjustment of the head which operates the body warps.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. Ina pattern mechanism for looms having a driving shaft, a pair of rotatable actuating cylinders, an upright shaft operatively connected to the cylinders to drive the same when the upright shaft rotates, driving connections between the loom driving shaft and the upright shaft, and a pivotal mounting for the upright shaft about which the latter is movable to be disconnected from the driving shaft, said upright shaft when moving about the mounting therefor preserving operative engagement with the cylinders while disconnected from the driving shaft of the loom.

In a pattern mechanism for looms having a driving shaft, a pair of spaced rotatable actuating cylinders, an upright shaft having operative driving engagement With the cylinders, driving connections between the loom driving and upright shafts, and a bearing for the upright shaft located intermediate the cylinders, said shaft being movable about the bearing out of driving engagement with the driving shaft while preserving operative engagement with the cylinders.

3. In a pattern mechanism for looms having a driving shaft, a pair of. actuating cylinders, an upright shaft, operative connections between the driving and upright shafts, and a movable support for the upright shaft about which the latter is movable as a center out of driving engagement with the driving shaft while preserving operative engagement with the cylinders.

l-. In a loom having a driving shaft, a pattern mechanism, a connecting shaft operativel'y connected to and intermediate the loom driving shaft and the pattern mechanism. said shaft being movable about its axis to impart movement from the driving shaft to the pattern mechanism and being movable about a second axis transverse to fixed member, and a cap for the fixed member, the cap being ren'iovable from the fixed memberby movement in a plane parallel to the plane in which the support for the upper portion of the upright shaft rotates.

In a loom having a driving shaft, a pattern mechanism, an upright shaft interposed between the driving shaft of the loom and the pattern mechanism and having 0perative connection wtih said driving shaft and mechanism, and angularly movable supporting means for the upright shaft about which the latter is movable out of engagement with the driving shaft of the loom while preserving operative contact with the pattern mechanism.

7. in a pattern mechanism for looms having a driving shaft, a pair of rotatable cylinders, an upright shaft having operative driving connection with each cylinder at the upper portion thereof and having driving connection with the loom shaft at the lower portion thereof, a pair of bearing members for the shaft, one adjacent each end of said shaft, the bearing for the lower end of the upright shaft having fixed and movable parts and the lower end of the shaft being movable away from the fixed part, and the bearing for the upper portion of the upright shaft being angularly movable and moving with the upright shaft as the latter is moved out of engagement with the fixed part of the lower bearing to maintain driving connection between the upper portion of the shaft and the cylinders.

8. In a pattern mechanism for looms having a driving shaft, a pair of rotatable cylinders, an uprigl'it shaft having operative driving connection with each'cylinder at the upper portion thereof and having driving connection with the loom shaft at the lower portion thereof, a pair of bearing members for the shaft, one adjacent each end of said shaft, the bearing member for the lower portion of the upright shaft having fixed and movable elements and the lower end of the shaft being movable away from said fixed element, and the bearing for the upper portion of the upright shaft located between the cylinders and being angularly movable and moving with the upright shaft as the latter is moved out of engagement with the fixed element of the lower bearing to maintain driving connection between the upper end of the shaft and the cylinders.

9. In a pattern mechanism for looms having a driving shaft, a head motion comprising spaced oppositely rotatable cylinders, an upright shaft having operative connect-ion with each cylinder and operatively connected to the driving shaft of the loom, a selvage motion comprising cooperating elements one of which is fixed and the other of which is carried by the upright shaft, and a bearing for the upright shaft located between the cylinders and about which the up ight shaft moves when moving out of engagement with the driving loom shaft and fixed element of the selvage motion while maintaining operative connection between the cylinders.

l0. in a pattern mechanism for looms having a driving shaft, a head motion comprising spaced oppositely rotatable cylinders, an upright shaft having operative connection with each cylinder and operativel y connected to the driving shaft of the loom a selvage motion comprising cooperating gears one of which is fixed and the other of which is carried by the upright shaft and a pivoted support for the upright shaft movable about an axis substantially parallel to the plane of the fixed gear.

In testimony whereof I have hereunto at' fixed my signature.

WALTER Hl WAKEFIELD. 

